drm/dp_mst: add a function to retrieve vcpi slots

radeon requires this to get the slots for later filling out a table on every transition. Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
git-mirror · Mar 19, 2015 · 87f5942 · 87f5942
1 parent 875711f
commit 87f5942
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diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2319,6 +2319,19 @@ bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp
 }
 EXPORT_SYMBOL(drm_dp_mst_allocate_vcpi);
 
+int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port)
+{
+	int slots = 0;
+	port = drm_dp_get_validated_port_ref(mgr, port);
+	if (!port)
+		return slots;
+
+	slots = port->vcpi.num_slots;
+	drm_dp_put_port(port);
+	return slots;
+}
+EXPORT_SYMBOL(drm_dp_mst_get_vcpi_slots);
+
 /**
  * drm_dp_mst_reset_vcpi_slots() - Reset number of slots to 0 for VCPI
  * @mgr: manager for this port

diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h
@@ -486,6 +486,8 @@ int drm_dp_calc_pbn_mode(int clock, int bpp);
 
 bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots);
 
+int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
+
 
 void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
Original file line number	Diff line number	Diff line change
Expand Up		@@ -486,6 +486,8 @@ int drm_dp_calc_pbn_mode(int clock, int bpp);

		bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port, int pbn, int *slots);

		int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port);


		void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port);

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